Asymmetrical one-shoulder silk dress, US 4, NWT

Medium blue asymmetrical one-shoulder high-low silk dress by Mason, size US 4. Meant to be worn with the strap over the right shoulder. There's also a thin strap across the back for extra support. The right side of the dress is the high side, from the armpit to hem it measures 56 cm. The hem dramatically drops diagonally from there to the left (the low side) and back to the right to create a "train" effect. Fully lined. 100% silk. Retailed for $465. Never worn, with tags, but please note two stains: one on the front, the other on the lining of "the train".